<p>In this work, we adapt our recent article [<CitationRef CitationID="CR1">1</CitationRef>] to the setting of Dirichlet boundary conditions. A key part is the study of the parabolic equation <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(a\partial _t w - \Delta w = f\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>a</mi> <msub> <mi>∂</mi> <mi>t</mi> </msub> <mi>w</mi> <mo>-</mo> <mi mathvariant="normal">Δ</mi> <mi>w</mi> <mo>=</mo> <mi>f</mi> </mrow> </math></EquationSource> </InlineEquation> with a rough coefficient <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(a\)</EquationSource> <EquationSource Format="MATHML"><math> <mi>a</mi> </math></EquationSource> </InlineEquation>, homogeneous Dirichlet boundary conditions, and the special assumption <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\partial _tw \ge 0\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>∂</mi> <mi>t</mi> </msub> <mi>w</mi> <mo>≥</mo> <mn>0</mn> </mrow> </math></EquationSource> </InlineEquation>. We then apply it to prove existence of global strong solutions to the triangular Shigesada-Kawasaki-Teramoto (SKT) cross-diffusion system with Lotka-Volterra reaction terms in three dimensions and Dirichlet boundary conditions, and to obtain estimates for solutions to reaction-diffusion systems modeling reversible chemistry (still when Dirichlet boundary conditions are considered).</p>

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Hölder regularity of parabolic equations with Dirichlet boundary conditions and application to reaction-diffusion and reaction-cross-diffusion systems

  • Hector Bouton,
  • Laurent Desvillettes,
  • Helge Dietert

摘要

In this work, we adapt our recent article [1] to the setting of Dirichlet boundary conditions. A key part is the study of the parabolic equation \(a\partial _t w - \Delta w = f\) a t w - Δ w = f with a rough coefficient \(a\) a , homogeneous Dirichlet boundary conditions, and the special assumption \(\partial _tw \ge 0\) t w 0 . We then apply it to prove existence of global strong solutions to the triangular Shigesada-Kawasaki-Teramoto (SKT) cross-diffusion system with Lotka-Volterra reaction terms in three dimensions and Dirichlet boundary conditions, and to obtain estimates for solutions to reaction-diffusion systems modeling reversible chemistry (still when Dirichlet boundary conditions are considered).